Suddenly, the brother found himself joining his sister in the bath, thanks to her suggestion. But the bathtub didn't just contain ordinary water—it was filled with slippery lotion! The sister's excitement was at its peak for this first-time lotion bath. They smeared and clung to each other, escalating their lotion play. Before they knew it, the sister, feeling good, had an involuntary orgasm! Eventually, she crossed the forbidden line and started seeking her brother's penis!!